Needle-valve-operating mechanism for carbureters.



W. G. CARTER.

NEEDLE VALVE OPERATING MECHANISM FOR OARBURETERS. APPLIGATION FILED UUT.2, 1911.

1,124,697, Patented Jan. 12, 1915.

I lllllilll lillllllll my invention UNITED STATES PATENT OFFICE.

WILLIAM C. CARTER, OF ST. LOUIS, MISSOURI.

NEEDLE-VALVE-OPERATI NG MECHANISM FOR CARBUfiETFBfi To all whom it may concern:

Be it known that I, WILLIAii: 0. Carmen, a ultlZBI) of the United States, residing at St. Louis, Missouri, have invented a certain tor. i

One object of my invention is to provide a carburetor of the type referred to'which is economical in the consumption of fuel.

Another object is to provide a carbureter which will reduce a proper nnxtiire at high, low or" ntermediate speeds of the [notor on whicli'it is used. And still another object is to provide mechanism ofnovel construction for actuating the jet valve and for adjusting said valve accurately so as to obtain the proper supply of fuel at all speeds of the motor.

Other objects and'desirable features of will be hereinafter pointed I tweenthe interior of said sleeve and the in- I have herein illustrated my invention embodied in'a oarlmreter having an openendedsleeve surrounding the jet tube and a by iiess that "establishes communication betakepipeof the motor when the throttle valvgi-yisclosed. I do not wish it to be understood, however, that my invention is limited to a ca rbureter of the type just described for my present invention relates to a valve-operating arid adjusting mechanism which is capable oibeing used with various ty es of carburetors. 1

i re 1 ofthe drawings is a front 'eIeva' tiona view bio carburet'er] constructed in accordance wi my invention; Fig. 2 is a. side elevational View of same; Fig. 3 ,is a vertical sectional view taken on the line 3-3 of Fig. 1; Fig.4 is a horizontal sectional view taken on the line 4-4 of Fig; 15

Fig..5'is' a perspective view of the track which forms art of the mechanism 'for actuating thea et valve; Figs. 6, 6" and 6 are vertical cross Sectional views taken on Serial No. 652,387.

the lines 6-6, (5-0: and 12-?) of Fig. 5; Fig.

I is a sectional view taken on the line 7--7 of Fig. 5; Fig. 8 is afront elevational viewillustrating a slight modification of my invention; Fig. 9 is a detail view illustratin another modification; Fig. 10 is "a deta l Specification of Letters Patent. Patented Jan. 12, 1915.

Application filed October 2, 1911.

view illustrating still another modification; f

and Fig. 11 is a sectional view taken on the line 11-11 of Fig. 10.

Referring to the drawings which illustrate the preferred form of my invention, A designates a substantially tubular-slur ed member provided at its upper end with a flange 1 that is adapted to be connected-to the intake pipe of the motor so as to forums.

pasageway through which air is drawn by tli suction created in the cylinders of the motor. The lower end of the member A branches laterally, as shown in Fig. 1, and

said member is provided intermediate its.-

ends with an annular-shaped flange '2 so as to produce a contracted air passageway 3 which is of less diameter than the lower and upper ends of the member A. A vertically disposed fuel supply tube 4 is arranged in the lower portion of the member A, as shown in F! 3, and said tube is provided with a fuel et or orifice 5 that is 10 outed adjacent the contracted air passage way 3'inside of the member A, the upper end of said tube 4; being closed by a cap 6 and the lower end of said tube communicating with a fuel duct 7 that leads to a float An open-endcd sleeve 8 sun chamber B. rounds the upper portion of the fuel supply tube 4 and the interior of said sleeve 'cpmniunicates with a duct or ipe 9, shown in broken lines in '1, which extends up'- wardly to a point above the throttle valve.

10 so as toestabli sh direct communication? between the intake the fuel supply jet w en the motor is throt tled down, the sleeve 8 being enough larger than the fuel supply pipe 4: to form a pas sageway between said pipe and the interior of the sleeve through which the air can.

travel when the throttle valve is open.

A needle valve 11 is provided for re lating the flow of the liquid fuel throng the orifice or jet 5 in the fuel su ply pipe 4. said needle valve bein arrange at. a proximately right angles to the open-ende sleeve 8 and projecting through an opening in said sleeve, as shown in Fig. 3, so that its ointed end will enter the fuel jet 5 and t us increase or diminish the flow of fuel from ipe of the motor and,

said jet according to the position of the needle valve. The mechanism for actuating the needle valve 11 is of novel construction and consists principally of an adjustable. track C which moves when the throttle valve 10 is operated, and a lever 12 pivotally mounted intermediate its ends on a. brarl it 13 on the member A and arranged with its upper end in engagement with the track (7 an its lower end in alxnement with a springpressed plunger ll which carries the needle valve 11. The necdlewalve-carrier H is preferably reciproratingly mounted in the member A, as shown in Fig. 3, and it is provided at its outer end with a. flange Iii which is acted upon by a coiled expansion spring 15 that tends to force the carrier 14 outwardly so as to exert sullicient pressure. on the lower end of the lever 12 to hold the upper end of said lever in engagement with the trach: C, the spring 15 being nrranged on the carrier 14. between the me1nher A and the iange 11 on the outer end of said carrier. The needle 11 is retained in the carrier i l by means of a. bushing 16 at the inner end of the carrier which acts as a stop for the head on the outer end of the needle valve, and a coiled expansion spring 17 is arranged in a pocket in the carrier 14 so as to form a ullSlllOIl or yield ing abutment for the needle valve which permits said valve to yield or move rela tively to the carrier ll in case the carrier is forced inwardly too far, thereby eliminating the possibility of the needle valve being forced too far into the fuel jet- 5. In order that the needle valve may be adjusted rately with reference to the lever 12 which operates it so as toohtain the proper supply of fuel at low speed of the motor, I have provided said lever w th an adjustable member 18 which bears against the outer end of the needlc-valve-carrier 14, said me mber having a substantially ciip shaped head which receives the outer end of the needle- \alV -'ELI'l'l(1,mul a. scrcn threaded shanlclQ whic'hpasece through a screw-threaded open inginthrlon'cr end of the lever 12,513 shown in Fig. 2. By turning the member 18 in one direction or the other the ncedle-valve eai rier can he moved inwardly or outwardly and thus change the position of the needle with l8fliit"l']('l to thefuel jet Any suitable means may be employed for looking the member 18 in position, the means herein shown consisting of a spring-pressed bell 30 mounted in an arm on the lever 12 which migag'cs teeth or serrations in the outer surface of the memhi 1%, as shown in F 2 and 2-5.

The track 0 is suostantially arc-shaped, as shown in Figs. 1 and 5, and its front face or opcratin face against which the upper end of the ever 12 bears is so shaped that it comprises a. plurality of track surfaces whose intermediate portions are of o 1 v rontoor. At the lower end of said track is a straight 'vertitail surface 2:30 on which the upper nd of a lever 12 bears at low speed, and .it the upper end of said track is a at A vertical surface 39 on which the end of the lever 1:5 bears at high The intro-mediate portion of the l'ront fare of said track, between the vertical surl'arv Ch; and 30, is tapered downwardly and mutual-div From ill!) upper edge of the trarlc and also long:tudinall v, as shown in l it s. i 6 and Y. the lower end of the track Ewing thicker than the upper end. (onsecpu oily, when the track C is moved to the right from. the position shown in Fig. 1

- end of the lever 12 will move inin passing l'mm the straight Vertical I (alto the tap red surface at the ate portion of the track and will continue to move inwardly until it passes the straight \ertiral surface 30 at the V end of the track, thus causing the lower and of the lever ii! to move outwardly s as to grad :ally increase the size of the throttle valve is moved o1 iil e when the min cloned into open position.

The track (l is carried by an arm or pin that projects downwardly from the rock shal i"? to which the throttle valve 10 is c'mznct'tcd; so that said track moves in a circular path around the shaft 22 as an axis. The track (l is mounted on the pin :cl 311 StH'l'l a manner that the upper reduced cud of the track can be adjusted inivardly and outwirdly so as to vary the throw of the lever it? or change the position of said lever at high speed hen the. upper end of same bears against the i ertical face 30 of the Mark, the pin 21 being round in cross section and passing loosely through a hole formed in the lower end portion of the track.

The means shown in Fig. l. For adjusting the track U laterally or turning about the pi 21 as an axis consists of a screw 23 adjustahly mounted in an arm 24. on the throttle valve shaft and provided at its upper end with a spoolehaped head 25 into which the upper end of the track C projects, as shown H1 Figs. 1 and 4:. By turning the screw 23 in one direction the upper end of of the lever 12; and

'the position of the truck C C it WilllOfcoursmbe understood-that. various as-to lock the screw in adjusted position; blitother means can'be used for this urpose without; departing from-the spirit '0 my in- The screw 235s used for changingso as to adjust the needle valve 11 in the proper position to obtain the requiredquantity of fuel on high speed of the motor, namely, when the throttle valve is wide open, but a separate and distinct means isemploycd for obtaining the proper adjustment of the needle valve 11 at intermediate speed or when the motor is partially throttle-d down. Thislatter adustment, namely, the adjustment for-intermediate speed, may be effected either by sl'iifting the track C vertically relatively to the lever 1'3. so as to cause the upper end of said lever to travel on a. higher or lower part of the inclined front face of the track, or by shifting the lever 1.2 or the upper end portion of said lever vertically relatively to the track C to accomplishthe same result.

In Fig. 1 I have shown the track C provided at its lower end with a depending lug C that has an elongated horizontally disposed slot through which a cotter key 27 on the pin 2.] passes. said pin being provided with a number of openings for receiving said cotter key so as to enable the track C to be adjusted vertically on the pin 21., and in Fig. 8 l have shown a slightly different jet 5, this being true in any vertical adjust construction wherein the lever 12 is provided with a vertically adjustable extension 12 that cooperates with the track C, said extension having a number of openings which receive a cotter key 27 on the lever 12.

In view of the fact that the front face of the track C is provided with vertical surfaces adjacent the upper and lower ends of thctraclc, the upper end of the lever 12 will always start from the same point and terminate at the same point, irrespective of the vertical adjustment of the track C. Theonly elfect the vertical. adjustment of the track C has on the lever 12 is to cause said lever.to describe a different path at intermediate speed or when the lever is traveling on the inclined surface on the central portion of the track.

When the throttle valve is closed as shown in Fig. 3, the track C will occupy the position sho'wnin said figure and in Fig. 1, so

that very little fuel can escape from the fuel ment of the track C. lVhen the throttle valve is opened the track C swings to the right, looking at Fig. 1; thus permitting the upper end of the lever 12 to move inwardly and consequently causing the needle valve to move outwardly into such a position that more fuel can esca e from the fuel jet 5, the upper end of the ever 12 being held in engagement with the track by means of the springdb which bears against the lower end of said lever.

' If the supply of fuel which escapes from the fuel jet 5 is not suliicient when the throttle valve is wide open the operator adjusts the screw 93 so as to move the upper end of the track C inwardly and thus increase the throw of the lever 12 of the needle valve at high speed. If the supply of fuel is too great the operator adjusts the screw 33 so as to move the upper end of the track C out wardly so as to decrease the throw of the lever 12 and the needle valve at high speed. If the supply of fuel which emerges from the fuel jet 5 is not sullicient when the motor is partially throttled down to interme diate speed. the operator adjusts the track C downwardly on the pin 21 so as. to shift said track relatively to the lever 12 and thus permit the upper end of said lever to move inwirdly farther when the track C has been shifted partway to the right from the position shown in Fig. 1. If the supply of fuel is too great when the motor is partially thiottled down the operator adiusts the track C upwardly so as to cause the needle valve to move inwardly a little farther when it is traveling on the intermediate portion of the track. The adjustment of the fuel for low speed or when the motor is throttled way down is effected by turning the member 18 which coilperates with the needle valve carrier 14, as previously described.

One desirable feature of a needle valve operating mechanism of the construction above described is that the track C can be so adjusted that the orifice through which the fuel escapes is larger when the throttle valve is only partly open than it is when the throttle valve is wide open, the increase in the dimensions of the fuel orifice 00mpensating for the relatively small suction at intermediate speed, and thus insuring -l. sutlicient supply of fuel at intermediate speed to produce a charge of the proper richness. track C can be adjusted laterally and is provided with a front face that tapers inwardly longitudinally from a vertical surface 30 on which the upper end of the lever 19, hears at low speed. hen the free or upper end of the track C is adjusted outwardly, the upper end of the lever 12 will move inwardly when the throttle valve starts to open and then travel outwardly onto the straight surface 30 at end of the track, thus causing the needle valve to be drawn outwardly farther at intermediate speed than at high speed when the throttle valve is wide open.

In order that the throttle valvemay be moved in the direction opposite to that indicated in Fig l, I have provided the track C with two operating faces of the same contour, thus enabling the track C to be the upper &

turnco in the opposite direction to that shown in the drawings.

Instead of using a separate means for adjusting: the upper end of the track C laterallv I could, of course, use one means for effecting hoth adjustments of said track. In Fig. 10 1 have illustrated such a structure, the track being provided with a bifurcated lmvcr end through which the pin 21 passes and having: moans, shell, for example, as a screw 31, for securely clamping the track to the pin ll. screw 31 the trawl; can he aised or lowered and also turned on the pin ll as to move the upper end ol the trarlc laterally, and after said sen-iv has been tightened the track will remain in adjusted position.

lVhilc l prefer to construct tho jet valve operating mechanism in the inanuecahove \lcscrilicd. uamclv, design it in such a mannor that it an lie adiusted for high, low and intermediate speeds. it would. at course, he practicalile to omit the high speed adlilbtlllfi'lil in cases where the carburetor is designed for use on a particular llifltm'. That is to say. it the carbureter is to he uscil on :1 motor of a certain make; the track i can he lornic-l integral with the depending pin rm the throttle valve shaft. as shown in Fig. and provided with a front 'FHPQ vvhosr long tudinal and transverse taper is such that thc proper quantitv of fuel will lll' lslll'll llltl at high speed or when the throttle min is wide open the front face of said vracli liein; hollowed out at 30, as prc\ iouslv de cribed so as to compensate For the relative-iv small suction at intermediate speed.

i carburetor equipped with a jet valve operating: mechanism ot the construction above described is economical in the consumption of fuel and produces a combustible gas of the proper richness at all speeds oi the motor: and, furthermore. such a valveoucrating mechanism (an be adjusted easily and accnratclv. and after it has once been :uliustcd it is not apt to get. out of ordcr.

llavin; thus described my invention hat l claim as new and desire to secure hr Letters Patcnt is:

l. in a carhlueter, a throttle valve, a uccdle val e for regulating the supplv of liquid Fuel, :1 de\ ice for varving the position of said nrcdlc valve, and a member operativclv wonw'lwl tosaiil throttle valve and provided with a fare against which said device hears. said lace comprising an in 'liued intermediate surfa e and two straight surl'ares l cated at the ends oi said inclined siirlarc.

L. in a rarluvcf'cr. a throttle valve. :1 needle alve for ren'ulatirm the supply of liquid fuel. :1 device l'or \':1I' \'ill f the position of sa d needle valvc, a rigid or inflexible, adjustable nieml cr operativclyconnected to By loosening the saitl throttle valve and provided with a face against which said device bears, said face comprising tazo surfaces that are parallel to one direction of adjustment of said memher and on which said device travels at high and low speeds and an inclined surface arranged between said parallel surfaces on vvhich said device travels at intermediate speed. and means for enabling said memlicr to be adjusted so as lo obtain the required quantity of fuel at high and intermediate speeds of the motor.

3. A carburcter provided with a fi1el-supplying device, a controlling valve co'riperating with said device, a throttle valve, an actuating incchitnlsin for said throttle valve, a lever cooperating with said fuel controlling valve, and an inflexible, vertically disposed arc-shaped track controlled by said throttle valve operating mechanism and provided with a tapered side face against which one end of said lever hears so as to cause the fuel-controlling valve to move simultaneously with the movement of the throttle valve.

A carhureter provided with a fuelsupplying device, a controlling valve co opcratiug with said device, a throttle valve,

an actuating mechanism for said throttle valve. a lever ooti 'serating with said fuelcontrolling valvc, fill epproxiniately are shaped inflexible track controlled by said throttle \alve operating mechanism for actuating said lever, said track having a surface which tapers longitudinally or lengthwise of the track and also inclines downwardly and outwardly from the upper edge of the track, and means whereby said lever may he caused to operate upon the high or low part of the inclined surface on said track. K

it carhureter provided with a fuel-suppl ring 'li'wii're. a controlling v'alve coiiperritifig with said device, a throttle valve, a

lover For actuating said t'uehcontrolling valve, mechanism for operating said throttle valve, a pivotally mounted arc-shaped track conlrollrti ll) said throttle valve operating iuvrhanism 'l'o: uating said lever, and means for adjusting: one end of said track laterally with reference to said lever so to vary the throw of the lever, said lever operating upon the side face of the track.

6. A carburetor provided with a fuel-supplying device, a controlling valve coiiperatin; with Fir-i l device a throttle valve, a lcv r for actuating said fuel-controlling ali r. me hanism l'or operating said throttle valve, an inllcxil l arwshap d track mount. ed on a lmrizontal pivot and controlled by said throttle valve operating mechanism for actuating said lever. said track having an inclined side face with which said lever cooperates, and means for adjusting said track transversely with reference to said lover so lair-11y transversely inclined surface against which one end of said pivotaily mounted member One offiaidmembers being adapted to'be adjusted so as to change the point 'atQyvhich said pivotally mounted member beans" upon the transversely inclined surface'of said arc-shaped member.

8. A carbureter provided with a fuel-supdevice, a controlling valve cooperat- I with said device, a throttle valve, a pivotally mounted member for actuating said fuel-controlling'valve, an arc-shaped member controlled by the throttle valve operat ingniechanism'ancl rovided with a transzriflversely inclined sur ace against which one end of said pivotally mounted member bears,

one of said members being adapted to be adjusted so as to change the point at which l'said pivot-ally inounte member bears upon thetransverselv inchncd surface of said arcshaped member, and independent means for ence to said lever, and means whereby the,

adjusting one end of said arcshaped membertransverscly with reference to said pivptally mounted member.

carburetor provided with a fuel-suplfing' device, a controlling valve cooperat- "fuel-controlling valve, a laterally projecting rm on said rock shaft, a substantially arcaped track mounted on said arm and pro ded with a transversely inclined and longitudinally inclined surface against which 'one end of said lever bears, means for adpoint of contact of said lever on said track can be varied.

10, A carburetor having an air passage way, a fuel-supplying tube provided with a fuel jet, a needle valve coiiperating with said jet, in carrier for said needle valve re ciprocatingly mounted in the wall of said air ,passageivay, a yielding cushion inside of said carrier which .permits said needle valve to move relatively to said carrier, a lever for operating said carrier, an adjustable member arranged between said carrier and lever for initiallv adjusting said needle valve, means for locking said member in adjusted position, and a spring which holds said carrier in engagement with said adjust able member.

11. A carburetor provided with a fuel jot, glgflneedle valve cooperating with said fuel with said device, a throttle valve secured a rock shaft, a lever for actuating said jet, a throttle valve, a lever for varying the position of said needle valve, amemberoperatively connected to the throttle valve and provided with an inclined face against" which one end of said leVer i eai'S, and

rneansvfor permitting said memlieto be ads] justeldlaterally and vertically with relation to said 'lever so as to obtain the proper quantities of fuel at high and intermediate Speeds. t

v '12. A calbureter providedwith a fuel jet, a needle valve cooperating with said fuel jet, a throttle valve, a position of said needle valve, a member operatively connected to the throttle valve and provided with an inclined face against which one end of said lever bears, means for permitting said member to be adjusted latlever for varyingthe erally and vertically with relation tosaid lever so as to obtainthe proper quantities of fuel at high and intermediate speeds, and means for enabling the needle valveto be adjusted relatively to said lever. so as to 1b.- tain the proper amount of fuel at low sp'd) 13.'In a carbureter, a throttle valve a needle valve for regulating the supplylj of liquid fuel, a device forvarying the POSll'jlOIl of said needle valve, a member-operatii/tely connected to the throttle valve and pro ded with an operating face against Winch lsaid device bears, and insane for enabling one of said-'pafts' to be adjusted relatively to the other so as to obtain the proper quantfty of fuel at intermediate speed, the operating face of said member being made up of a plurality of track surfaces whose i termediate portions are of diflerent conto r.

7 14. A carburetor provided with a fuel jet,

a needle valve cooperating with said. fuel jet, a throttle valve',-a lever for vai yingthe position of said needle valve, and asubstantially arc-shaped track o'peratively connect,

ed to the throttle valve'for'actuating said lever and provided'with a front face that,- has a transversely and Ion 'tudinally inclined portionv on .which sai lever bears at intermediate speed of the motor.

15. A carbureter provided with a fuel jet. a needle valve cooperating with said fuel jet, a throttle valve, a lever for varying the position of said needle valve,- a substantially arcshaped track operatively connected to the throttle valve for actuating said lever and provided with a front face that has a transversely and longitudinally inclined portion on which said lever bears at inter mediate speed of the motor, said track having substantially straight vertical faces on which said lever bears at low speed and high speed, and means for permitting said track and lover to be adjusted vertically with relation to each other so as to obtain the proper quantity of fuel at intermediate speed.

16. A carburetor provided with a fuel jet,

a needle valve coiiperating with said fuel track to be adjusted laterally-and vertically jet, :1 throttle valve, a lever for varying the WithQrelation to said lever 30 as to obtain position of said needle valve, a substantially the proper quantity of fuel at high and in- 15 arc-shaped track operatively connected to termediate speeds the throttle valve for actuating said lever In testimony whereof I hereunto'aflix and provided with a front face that has a signature in the presence of two with transversely and longitudinally inclined this twentiethday of September 1911.

portion on which said lever bears at inter- C A ER mediate speed of the motor, said track having substantially straight vertical faces on o Witnesses:

which said lever bears at low speed and WELLs L. CHURCH, high speed, and means for permitting said GEORGE BAKEWELL.

It is hereby certified that in Letters Patent No. 1,124,697, granted January 12, 1915, upon the application of William C. Carter, of St. Louis, Missouri, for an improvement in Needle-Valve-Operating Mechanism for Carburetors, an error appears in the printed specification requiring correction as follows: Page 4, line 63, for the word carrying read varying; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 0th day of February, A. D., 1915.

[slum] J. T. NEWION,

Act-mg 00mm m 0 1 'atenu. 

